Do you mean "chip" as in a programmer? You don't need to do any modifications to use one, and there are alot of brands of them, Edge Products, Superchips, Bully Dog, SCT. Yes it would be wise, I have an Edge
Evolution and I gained about 1-2 MPG and alot of power, it woke the truck up.
2006 Ford F-150 Supercrew Lariat
305/55/20 (33's) Terra Grapplers on Dick Cepek DC-2's
Rancho Quicklift's on front, Bilstein 5100's on rear